## Tags
Many Finix resources (e.g., `Authorization`, `Transfer`) let you include `tags` to add key-value metadata to your Finix API resources. For example, when creating a Transfer, you might include `customerId: Customer123` to tag the Transfer with your internal customer ID. You can update tags as many times as needed, as well as filter resources by tags.

```json Tags Example
{
    ...,
    "tags": {
        "card-type": "business card",
        "order_number": "H-1257",
        "customer_order_reference": "order1234",
        "item_type": "hardware",
        "vendor": "finix"
    }
}
```
The `tags` object accepts up to 50 `key: value` pairs to annotate resources with custom metadata.
- Maximum character length for individual `keys` is 40.
- Maximum character length for individual `values` is 500.

Finix does ***not*** allow special characters on tags (e.g., `\`, `,`, `"`, `'`)


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